I cannot get this to change my GPU utilization with a 1080ti. I am sitting at 50% utilization at a much lower freq. (1569mhz) This is actually ~30% utilization at my max boost of 1999mhz. I have changed the -nt 1 to -nt 3. The application is now using 32% of my 6 core 12 thread cpu clocked at 4.4ghz. Do you have any suggestion of how to improve this utilization?

As you have different configuration then I have you must just try which settings are best fit your machine.

Currently (for testing) I use 3 thread for WU and 2 WU at the same time (by editing app_config.xml file).

-nt 2 seems to be the same as -nt 3 in terms of GPU utilization. Whether I have 2 or 3 GPU applications running concurrently I get the same GPU utilization for some reason, ~60% at 1999mhz. I use this in my app_config.xml file I made:

You have set that single work unit can use only 20% of CPU thread. This value should by "1".

This has absolutely zero impact on how much CPU is used to feed the GPU. It only changes how many CPU threads are removed from doing CPU work. If its 1 then your 8 core CPU can only run 7 CPU tasks. If anything less than 1 BOINC will still run CPU tasks along with 1 GPU task. Then its up to the OS to give priority to feed the GPU. Process Lasso in windows and Linux has no issues properly feed GPUs.

I received 25 of the newest WU's and 6 coded out as Completed, validation inconclusive. Seems like a high percentage, but I did not write the Code and I will defer to the Project staff to decide if that is acceptable.